单项选择题
A.counterclockwise B.variable C.clockwise D.anticyclonic
How long are you prohibited to consume alcohol prior to...
单项选择题How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
A.within two hours B.within three hours C.within four hours D.within five hours
It is dangerous for vessels without the operational rad...
单项选择题It is dangerous for vessels without the operational radar（）the estuary.
A.to get B.to approach C.to proceed D.to close
Bales close to the deckhead should be covered to preven...
单项选择题Bales close to the deckhead should be covered to prevent（）.
A.damage by dripping sweat B.damage by odor contamination C.from striking structure D.from steel rusty
